Match the columns.
`{:(,"Column -I","Column -I"),((a),"Leptotene",(i)"Chiasmata"),((b),"Zygotene",(ii)"Chromosomes visible"),((c),"Pachytene",(iii) "The pairing of homologous chromosome "),((d),"Diplotene",(iv)"Clear appearance of tetrads"):}`

Options

A. (a) - (i),(b)-(ii),(c) -(iv),(d) -(iii)
B. (a) - (ii),(b)-(iii),(c) -(iv),(d) -(i)
C. (a) - (ii),(b)-(iii),(c) -(i),(d) -(iv)
D. (a) - (iv),(b)-(iii),(c) -(ii),(d) -(i)

Answer

To solve the matching question, we will analyze each stage of meiosis (Column I) and find the corresponding description (Column II).

### Step-by-Step Solution:

1. **Identify the stages of meiosis:**
- **Leptotene (a)**: This is the first stage of prophase I in meiosis. During this stage, chromosomes start to condense and become visible under a microscope.
- **Zygotene (b)**: In this stage, homologous chromosomes begin to pair up, a process known as synapsis.
- **Pachytene (c)**: This stage is characterized by the formation of tetrads, where paired homologous chromosomes are closely aligned.
- **Diplotene (d)**: In this stage, the paired homologous chromosomes begin to separate but remain connected at points called chiasmata, which are formed during crossing over.

2. **Match with the descriptions:**
- **Leptotene (a)** matches with **(ii) "Chromosomes visible"** because this is when the chromosomes first become visible.
- **Zygotene (b)** matches with **(iii) "The pairing of homologous chromosomes"** as this stage involves the pairing of homologous chromosomes.
- **Pachytene (c)** matches with **(iv) "Clear appearance of tetrads"** since tetrads are formed during this stage.
- **Diplotene (d)** matches with **(i) "Chiasmata"** because chiasmata are formed during this stage as a result of crossing over.

### Final Matches:
- (a) Leptotene → (ii) Chromosomes visible
- (b) Zygotene → (iii) The pairing of homologous chromosomes
- (c) Pachytene → (iv) Clear appearance of tetrads
- (d) Diplotene → (i) Chiasmata

### Summary of Matches:
- a → ii
- b → iii
- c → iv
- d → i